261046 has 4 divisors (see below), whose sum is σ = 391572. Its totient is φ = 130522.

The previous prime is 261043. The next prime is 261059. The reversal of 261046 is 640162.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 640162 = 2 ⋅320081.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65260 + ... + 65263.

It is an arithmetic number, because the mean of its divisors is an integer number (97893).

2²⁶¹⁰⁴⁶ is an apocalyptic number.

261046 is a deficient number, since it is larger than the sum of its proper divisors (130526).

261046 is a wasteful number, since it uses less digits than its factorization.

261046 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130525.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 261046 is about 510.9266092111. The cubic root of 261046 is about 63.9105194839.

The spelling of 261046 in words is "two hundred sixty-one thousand, forty-six".